Animal Reproduction Biology Agriculture Reproductive System n Ovaries
Animal Reproduction Biology Agriculture
Reproductive System n Ovaries n n Female reproductive gland in which eggs are formed and hormones are produced. Testes n Male reproductive gland that produces sperm and testosterone.
Reproductive System n Female Reproductive Cell n n EGG (OVULE) Male Reproductive Cell n n SPERM Semen - the fluid that carries sperm
Reproductive System • Production of sperm is called SPERMATOGENESIS • Production of eggs is called OOGENESIS
Reproductive System n Zygote n n Embryo n n Organism in early stages of development. Pregnancy n n Cell formed by the union of egg and sperm at fertilization. carrying a fetus Fertilization n the union of the egg and sperm nuclei
Reproductive System n Conception n n Ovulation n n occurrence of fertilization release of an ovule from the female. Gestation n the time from fertilization or conception of a female until she gives birth
Reproductive System n Vulva -opening of reproductive tract
Reproductive System n Vagina - channel for birth and copulation
Reproductive System n Cervix - divides vagina and uterus
Reproductive System n Uterus - provides nourishment for fetus
Reproductive System n Horns of Uterus - where fetus grows
Reproductive System • Fallopian Tube - where fertilization occurs
Reproductive System n Ovaries - produces eggs and hormones
Reproductive System n Testes - produce sperm and testosterone
Reproductive System n Epididymis - collects and stores sperm
Reproductive System n Vas deferens - transports sperm
Reproductive System n Penis - places sperm in female
Reproductive System n Scrotum - protects testes, maintains temp
Reproductive System n Sheath - opening of reproductive tract
Animal Reproduction n Ovaries – produces eggs and hormones
Animal Reproduction n The ovaries are stimulated by a hormone called the follicle stimulating hormones (FSH) and produce a FOLLICLE where the egg (ovum) grows and matures
Animal Reproduction n When the egg matures the follicle ruptures and releases the egg OVULATION
Animal Reproduction
Mating Process n Around the time of ovulation estrogen causes estrus or heat n n The time that the female will allow the male to mate with her Males seek out females that are in estrus
Mating Process n n During mating millions of sperm are deposited in the female vagina. Sperm moves by using their tails in a whiplike action – motile
Mating Process n n Sperm travels from the vagina through the cervix and uterus and into the fallopian tubes Sperm and egg unit in the fallopian tube
Reproductive Technologies n Any method of reproduction that is different from natural methods
Reproductive Technologies n Embryo Transfer: n The transfer of fertilized egg(s) from a donor female to one or more recipient females
Reproductive Technologies n Embryo Transfer
Reproductive Technologies n Embryo Transfer
Reproductive Technologies n Super Ovulation: n Giving animals a hormone that causes them to produce more then one egg.
Reproductive Technologies n Artificial Insemination n Placing sperm into the female reproductive tract by means other than natural mating.
Reproductive Problems n Sterility: n n Inability of an animal to reproduce Freemartin: n n In twins, when a female is exposed to male testosterone before birth. Causes problems with the development of female reproductive organs
Reproductive Practices n Purebreeding n n n Breeding two pure breed animals together Usually papered to prove genetics Crossbreeding n n One breed is breed to another Ex. Angus x Herford = Black Baldy
Reproductive Practices n Grading-up n Taking grade cows and breeding to purebreds
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